1. College of Earth Sciences, Jilin University, Changchun 130061, China;
2. Key Laboratory of Oil Shale and Coexistent Energy Minerals of Jilin Province, Changchun 130061, China;
3. Key Laboratory for Evolution of Past Life and Environment in Northeast Asia(Jilin University), Ministry of Education, Changchun 130026, China

In order to study the favorable conditions for organic matter enrichment in the oil shale-bearing suc-cessions of the Lower Cretaceous Bayingebi Formation in Yin'e Basin, a comprehensive study was undertaken through outcrop survey, lithological observation, mineralogical analysis and element geochemical testing. X-ray dif-fraction analysis shows that the samples mainly consist of terrigenous clastic minerals and clay minerals. The clay minerals comprise minor kaolinite, and a small amount of calcite and dolomite occur in oil shale. TOC, S₁ + S₂ and other organic geochemical indexes show that the organic matter in oil shale are mainly type I and type Ⅱ₁, type Ⅱ₂ and type Ⅲ in other shale, they are in the stage of low maturity and immature as a whole. The comprehensive geo-chemical analysis of inorganic elements such as Sr/Cu (3.24~390.70), Sr/Ba (0.17~4.77) and V/(V + Ni) (0.39~0.84) shows that the oil shale-bearing successions of the Lower Cretaceous second member of Bayingebi Formation in the Bagemaode area of Yin'e Basin was deposited in alternative hot and drought climate and warm hu-mid climate, and a reducing environment of fresh water and saline water alternation. The hot and arid climate and saline-brackish water environment is conducive to the enrichment of organic matter and the formation of high-quality oil shale.